Paper manufacturing



Patented Aug. 13, 1929.

UNITED STATES PATEr OFFICE.

MOISEY M. SEREBRIANOI, OF SALTYKOVKA, UNION OF SOCIALIST SOVIET REPIIIBLICS,

RUSSIA.

PAPER MANUFACTURING.

No Drawing. Application filed September 26, 1928, Serial No. 308,572, and in the Union of Soviet Republics December 23, 1925. I

My invention relates to paper manufacturing and has a particular reference to paper products made of vegetable fibrous waste materials of different kind also to the 5 process of manufacturing paper products from such waste materials.

The object ofmy invention is to provide amethod whereby commercial grades of paper and paper board can be manufactured 10 from cheap waste materials, such as ordinary wood of diflerent grades, bark, sawdust, moss, dried grass, straw, waste paper, rags, cork, etc.

These materials are dried in order to re- 16 duce the moisture content to about 445% then ground and powdered in suitable machines such as high speed roller mills with blowers, ball mills, stone grinding mills, etc. The powdered material is screened and the 2 tailings arepowdered again. Ordinary air separators may be used for this purpose, also shakers and rotary screens of atype used in flour and cement mills.

The powdered material is placed in a tank 2 with an agitator and a mixture of equal quantities of-turpentine and gasoline (or benzin), or turpentine and kerosene, are added, a total of from 6 to 10% by weight.

In order to obtain a more uniform mixture it is recommended to use an excess of the above mixture of asoline and turpentine or similar hydrocar on's). A portion of t is mixturecan be recovered when mixing operation is completed, by squeezing or pressing out from the pulp, or by some other method.

If it is desired to produce a very soft and flexible paper then rubber should be added to the pulp, about 24% by weight, or acor- 40 responding amount of powdered leather scrap.

After the pulp has been thoroughly mixed with added hydrocarbons it is used for making paper or paper board by one of the following methods:

1. The paper and board are made by a process similar to the one used in rubber manufacture, i. e. by drawing the pulp between hot and cold rolls until the desired 60 thickness and density are obtained.

2. The prepared mass or pulp is fed into the it of an ordinary aper machine provide with a srtable' agitator, which is necdrawing the resultant mixture into sheets.

essary for a continuous and thorough mixing. The process of making paper is then continued as with an ordinary paper pulp. The aper and paper board obtained by my method possess all the properties of ordinary commercial products of this kind, being considerably cheaper for the manufacture, as I am using cheap waste materials for same. The properties of the finished product may be varied according to requirements by modif ing the composition as it was explained a ove.

. I claim as my invention: 1. In a process of manufacturing paper, consisting in grinding and pulverizlng a mixture of dried ve etable waste materials, mixing said materia s with turpentine, and

2. In a process of manufacturing paper, consisting in grinding and vpulverizmg a mixture of dried vegetable waste materials, mixing said materials with turpentine and with mineral hydrocarbon, and drawing the resultant mixture into sheets.

3. In a process of manufacturing paper,

consisting in grinding and pulverizing dried wood, bark, sawdust, grass, straw, paper, rags, cork, or the like, mixing said matter with turpentine and mineral hydrocarbon, and drawing the resultant mixture into sheets. 4. In a process of manufacturing paper, consisting in grinding and pulverizing wood,- bark, sawdust, grass, straw,- paper, rags, cork, leather, or the like, mixing said .materials with turpentine and mineral hydrocarbons, adding rubber, and drawing the resultant mixture into sheets.

5. In a' process of manufacturing paper, consisting in grinding and pulverizing dried wood, bark, sawdust, grass, straw, paper, rags, cork, or the like, adding from 6 to -10 percent of a mixture of equal parts of turpentine and a mineral hydrocarbon, I and drawing the resultant mixture into sheets.

6. In a rocess of manufacturing paper, consisting in grinding and pulverizing dried fibrous materials, adding from 6 to 10 percent of a mixture of turpentine with mineral hydrocarbon, and drawing the resultantmixture into sheets 7 In a COIIIPOSItIOII matter for manufactunng paper, consisting of a mixture of finely ground fibrous materials with turpentine and mineral hydrocarbon.

8. In a composition matter .for manufacturing pa r, consisting of a mixture of fine- 5 1y groun dried fibrous materials with turpentine and mineral hydrocarbon.

I 9. In a composition matter for manufacturing pa er, consisting of a mixture of finely groun dried fibrous materials with a 1 mixture of turpentine and mineral hydrocarbon, said last named Substances being taken in approximately equal proportions.

10. In a paper, made of finel ground dried fibrous materials mixed wit turpentine and mineral hydrocarbon; 15 11. A paper, made of finely round dried fibrous materials mixed with from 6 to 10 percent of a mixture of turpentine and a mineral hydrocarbon.

Signed at the city of Riga, Republic of 2 Latvla, this twentieth day of August A. D. 1928.

MOISEY M. SEREBRIANOI. 

